<template>
  <el-breadcrumb class="app-breadcrumb" separator="/">
    <transition-group name="breadcrumb">
      <el-breadcrumb-item v-for="(item,index) in levelList" :key="item.path">
        <template v-if="item.meta.title&&item.meta.breadcrumb!==false">
          <span v-if="item.redirect==='noredirect'||index==levelList.length-1"
            class="no-redirect">{{ $t(item.meta.title)}}</span>
          <a v-else @click.prevent="handleLink(item)">{{ $t(item.meta.title)}}</a>
        </template>
      </el-breadcrumb-item>
    </transition-group>
  </el-breadcrumb>
</template>

<script>
  import pathToRegexp from 'path-to-regexp'

  export default {
    data() {
      return {
        levelList: null,
      }
    },
    watch: {
      $route() {
        this.getBreadcrumb()
      },
    },
    created() {
      this.getBreadcrumb()
    },
    methods: {
      getBreadcrumb() {
        let matched = this.$route.matched.filter((item) => {
          if (item.name) {
            return true
          }
        })
        const first = matched[0]
        // if (first && first.name !== "dashboard") {
        //   matched = [{ path: "/", meta: { title: "首页" } }].concat(matched);
        // }
        this.levelList = matched
      },
      pathCompile(path) {
        // To solve this problem https://github.com/PanJiaChen/vue-element-admin/issues/561
        const {
          params
        } = this.$route
        var toPath = pathToRegexp.compile(path)
        return toPath(params)
      },
      handleLink(item) {
        return
        // 用于展示当前页，展示不需要后面的逻辑
       const {
          redirect,
          path
        } = item
        if (redirect) {
          this.$router.push(redirect)
          return
        }
        this.$router.push(this.pathCompile(path))
      },
    },
  }
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
  .app-breadcrumb.el-breadcrumb {
    display: inline-block;
    font-size: 14px;
    line-height: 50px;
    margin-left: 10px;

    .no-redirect {
      color: #97a8be;
      cursor: text;
    }
  }
</style>